Electeic bake oven



De`c. 8, 1925- A. R.- Ross ELECTRIC BAKE ovn i Filed Sept- 10. 1924 @mmmI;

q 7 lob /0af l l ENTOR 3 LLE l?. ROSS Jl-@z lli Patented Dec. 8, 1925.

"UNITED stares' escasas ALLEN R. ROSS. 0F SEATTLE. VIASHINGTON.

ELECTRC :BAKE OVEN.

Application filed September To all 'whom t may concern.'

Be it known that I, ALLEN R. Ross, a citie zen of the United States, anda resident of Seattle, King County, Washington, have invented certainnew and useful lmprovements in Electric Bake Ovens, of which thefollowing is a specification.

This invention relates to improvements in electrically heated ovens andmore particularly to ovens of thelarger types such as are adapted foruse in restaurants, bakeries, hotels and like places, the inventionrelating particularly to a construction that provides for the removal,or replacing oi heating elements while the oven is in use.

In order to give a clearer understanding of the objects of theinvention, it will be stated herethat ovens oi' thistype have heretoiorebeen so constructed t-hat the heating elements have to be inserted `orremoved through the oven door. An objection to this method ofconstruction is that should an element burn out or becomedamaged whilethe oven is in use, it is necessary that the oven door be held open forsuch an extended period that the oven becomes cooled off and there willbe a resultant damage to the ma teria] being baked.

It will further be stated here that with ovens that require `that theheating elements be removedmor inserted, through the oven door,diiiiculty is experienced and more time is required forthe replacing orinstalling of elements than by the improved construction hereinafterdescribed.

In View of the above mentioned objections, it has been the object ofthis invention to provide an oven or' such` construction that should itbe necessary, or desirable, to do so the elements may be removed, orreplaced, without necessitating the opening of the oven door or theremoval of any wall or other part that would permit the escape of heat,or the inflow ot cooler outside air into the oven.

Other objects of the invention reside in the variousdetails ofconstruction and combination of parts as will hereinafter be described.

In accomplishing these and other objects of the invention, l haveprovided the improved details of construction, the preferred forms ofwhich are illustrated in the accompanying drawings, wherein-n Figure .lisY a front, perspective view of a part of an oven embodying features ofconl, i924. Serial No. 736,955.

struction, in accordance with the present invention. i

Figure 2 is an enlarged, vertical sectional view of the oven showing theconstruction embodied by this invention.

Figure 3 is a horizontal section taken on the line 3 3 in Figure 2.

Referring more in detail to the several views of the drawingsln itspreferred iorm oi construction, the outer Walls of' the oven would bemade up of spaced apart sheet metal plates l and 2, between which aninsulating material 3, such as asbestos fibre or other suitablematerial, is packed. The oven could be made to contain a plurality ottcompartments 4 wherein the baking is done and each olf these, as shownin Figure 2,'extended to the trout of the oven where a door frame 5 isiitted therein.

As shown best in Fioures 2 and 3, the door frame 5 is ott rectangularform, oi sheet metal construction, and extends substantially within andalso forwardly of the opening. lt is of such width that its opposite endportions fit against the opposite sides or" the oven and are securedrigidly thereto by means of the angle iron members 6 which have theirflanges bolted, or otherwiseliXed, respectively to the sides of the'frame and to the liront oven wall as shown in Figure 3.

The upper and lower Walls of the frame l2 are spaced from the adjacentWalls of the oven to provide spaces, through which the electric elements7, whereby the oven is heated, may be inserted or removed. These eloments are mounted on a trame comprising transverse bars 8 which, attheir opposite ends, are supported upon angle iron strips 9 secured tothe side walls of the oven. These elements may be removed bodily fromthe oven through the spaces between the door trame and the upper andlower Walls of the compartment t. In Figure 1, I have shown the lowerspace below the door frame enclosed.

Normally the spaces below and above the door frame are closed byremovable, packed inserts, each of which consists of a channeled member10 that is fitted within the space to be closed thereby and which hasits outer flange l0a extended to overlap the front wall of the oven towhich it is secured by screw bolts or the like, 12. The inner flange 101of the channel is turned laterally along its up per edge toward theouter flange, and between these two flanges and the base of the channelis an insulating packing i4. Angle iron strips 15 are detachably securedby bolts 16 extended through their flanges to the top and bottom wallportions ot the door traine and to the outer flanges l()a and of thechannel members. These latter strips serve as tin additional support forthe door frame to addrigidity to the structure and insure a tighterconstruction.

in insulated door 2O ot' a suita ale `'jgpe pivotally mounted in the.trame 5 to swing inwardly from its upper edge and its closing movementis limited by engagement with inwardly inclined cleats secured to theend walls ot' the frame.

Assuming that the oven is so constructed and that it should benecessariv to replace or remove one ot the elements Z during a bakingoperation, it is only necessaryv to remove the bolts or screws l2 thathold the flange l0 to the `front wall oic the oven and those that attachthe angle to the door frame andto then draw the channel iron insert outwardly. The element '4" may then be removed through the open spacethusprovided and replaced by a new one and the opening again closed bythe insertion of: the channel.

This does not necessitate the opening ofthe oven door and requires but aew seconds time, thus avoiding the cooling off of the oven and the lossot the material being baked.

Having thus described my invention, what` lessees spaces between it andthe upper and lower edges of the oven opening through which heatingelements may be removed or insertt ed, closures removably itted in saidspaces and means whereby they may be detachabl7 secured to the frame andto the oven wall.

3. in oven of the class described having a wall opening leading into theoven proper, a door frame disposed in said opening and providing spacesbetween its upper and lower walls and theledges of said` opening throughwhichy heating elements fork the oven mayy be removed orfinscrtech meanssecured to the/end walls et the frame and-to the oven walls whereby thetrame is rigidly supported; clcsuresfor said spaces, above and be lowthe iframe, removably lit-ted therein and having flanges1 adapted tooverlap thevoven vail adjacent. said openingand screws, or the-like,entendedthrough said lianges and into the oven wall-.whereby saidclosures may1 be heldremovably` in place.

e. An .ovenotthe class described having a wall opening leading into theoven, a rectangular door trame disposedin the said opening so as to`provide spaces above andy below it through which heating. elements forthe. oven may be inserted or removed; said trame extending partly withinand partly from the oven, angle iron members secured to thel endsoiv theframe and to the even walls to support the Jframe rigidly in. theopening closure members for said spaces above andbelow the rameeachcomprising a channel member wherein insulating packingiscontained andhavingl its outer flange extended to overlap the oven wall at the edgeof the opening, means for detachabb1 securing saidoverlapping flanges tothe oven wall, and angle members extended alongA the trame at upper andlower sides, and detachably` secured to the frame and to the outerflanges of said closure members.

Signed at Seattle, KingCounty, Washingcon. this 29th day of August,1924.

ALLEN R. ROSS.

'Ill

